设置cookie和获取cookie与JavaScript

问题描述

我试图设置一个cookie，取决于我在我的Html中选择的css文件。我有一个带有选项列表的表单，以及不同的css文件作为值。当我选择一个文件，它应该被保存到一个cookie大约一个星期。下次打开html文件时，应该是您选择的上一个文件。

I'm trying to set a cookie depending on which css file i choose in my Html. I have a form with a list of options, and different css files as values. When I choose a file, it should be saved to a cookie for about a week. The next time you open your html file, it should be the previous file you've chosen.

JavaScript代码：

JavaScript code:

function cssLayout() {
    document.getElementById("css").href = this.value;
}


function setCookie(){
    var date = new Date("Februari 10, 2013");
    var dateString = date.toGMTString();
    var cookieString = "Css=document.getElementById("css").href" + dateString;
    document.cookie = cookieString;
}

function getCookie(){
    alert(document.cookie);
}

HTML代码：

<form>
    Select your css layout:<br>
    <select id="myList">
        <option value="style-1.css">CSS1</option>
        <option value="style-2.css">CSS2</option>
        <option value="style-3.css">CSS3</option>
        <option value="style-4.css">CSS4</option>
    </select>
</form>

推荐答案

我发现下面的代码要比任何东西简单得多else：

I find the following code to be much simpler than anything else:

function createCookie(name,value,days) {
    if (days) {
        var date = new Date();
        date.setTime(date.getTime() + (days*24*60*60*1000));
        var expires = "; expires=" + date.toUTCString();
    }
    else var expires = "";
    document.cookie = name + "=" + value + expires + "; path=/";
}

function readCookie(name) {
    var nameEQ = name + "=";
    var ca = document.cookie.split(';');
    for(var i=0;i < ca.length;i++) {
        var c = ca[i];
        while (c.charAt(0)==' ') c = c.substring(1,c.length);
        if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
    }
    return null;
}

function eraseCookie(name) {
    createCookie(name,"",-1);
}

现在，调用函数 b
$ b

Now, calling functions

createCookie('ppkcookie','testcookie',7);

var x = readCookie('ppkcookie')
if (x) {
    [do something with x]
}

来源 -

他们今天更新了网页，因此网页中的所有内容都应该是最新的。

They updated the page today so everything in the page should be latest as of now.

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